The 23rd Digital Avionics Systems Conference (IEEE Cat. No.04CH37576)最新文献

{"title":"An optimization for packet delivery in integrated avionics systems","authors":"Qiao Li, Xiaolin Zhang, Huagang Xiong","doi":"10.1109/DASC.2004.1390813","DOIUrl":"https://doi.org/10.1109/DASC.2004.1390813","url":null,"abstract":"In integrated avionics systems, sub-systems and/or modulars are interconnected by packet-passing routers and switches. Therefore, some multiplexers or shared ports become critical resource for inter-communication tasks. For some cases such as nonblocking state data delivery and processing, we adopt max-plus algebra to describe the behavior of packet passing, so that the case, which is man-made and seriously non-linear, can be looked as a linear system. Being analogue in modern control theory, state space matrixes are applied in quantitative analyses. And even, packet delivery intervals are set in term of optimal feedback control schedule under the performance criteria.","PeriodicalId":422463,"journal":{"name":"The 23rd Digital Avionics Systems Conference (IEEE Cat. No.04CH37576)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114575880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A general methodology for assessing interference to aeronautical safety-of-flight receivers","authors":"R. J. Kelly, R. Frazier, E. LaBerge","doi":"10.1109/DASC.2004.1391254","DOIUrl":"https://doi.org/10.1109/DASC.2004.1391254","url":null,"abstract":"This paper presents a general method for establishing the allowable emission characteristics of both unwanted and intentional in-band emissions in a manner that ensures protection of aeronautical radio communications, navigation and surveillance systems. The methodology is based on a two-tiered approach, and has been used in the development of DO-235A and DO-292, as well as recent work by RTCA Special Committee 202.","PeriodicalId":422463,"journal":{"name":"The 23rd Digital Avionics Systems Conference (IEEE Cat. No.04CH37576)","volume":"13 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114089075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Neural network aided adaptive federal kalman filtering for intelligent integrated navigation application - [Not available for publication]","authors":"Lin Chai","doi":"10.1109/DASC.2004.1390753","DOIUrl":"https://doi.org/10.1109/DASC.2004.1390753","url":null,"abstract":"","PeriodicalId":422463,"journal":{"name":"The 23rd Digital Avionics Systems Conference (IEEE Cat. No.04CH37576)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126391112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Next generation space avionics: a highly reliable layered system implementation","authors":"R. Black, M. Fletcher","doi":"10.1109/DASC.2004.1390855","DOIUrl":"https://doi.org/10.1109/DASC.2004.1390855","url":null,"abstract":"Advances in electronics over the past decade have produced major improvements in the power and flexibility of personal computer systems. Unfortunately current avionics systems for space applications typically have not leveraged these COTS advantages. Recently, there has been a trend toward utilization of commercial bus interconnects, primarily VME and PCI. These parallel interconnects have the disadvantage that a single failure can disable an entire string of the redundancy. Honeywell has developed a patent pending architecture for an avionics system that combines the high reliability of previous serial systems with the flexibility and openness of direct COTS bus interface. A decade ago, the state of the art for avionics systems made a step change from the PAVE PILLAR systems of the 1980's to the integrated modular avionics (IMA) used in the Boeing 777. This next generation avionics architecture is not based upon traditional Byzantine redundancy structures, but on a truth based scheme where each element knows when an internal failure occurs and removes itself from the system. IMA utilizes a lock step microprocessor design that communicates to a COTS backplane for input/output, and to a virtual backplane/sup /spl trade// (a reliable, high-speed serial bus such as 1394 or AFDX) for intra-system communication. The system functions are implemented using an ARINC-653 time and space partitioned operating system. The entire system provides the simplicity of a simplex system, implements the highest level of reliability provides complete flexibility to reconfigure both software applications and hardware interfaces, allows for rapid prototyping using low-cost COTS hardware, and is easily expandable beyond the initial point implementation. As the only 5th generation avionics architecture, the concepts incorporated into Honeywell's IMA are ideally suited to be the backbone of the next generation Crew Exploration Vehicle for Project Constellation.","PeriodicalId":422463,"journal":{"name":"The 23rd Digital Avionics Systems Conference (IEEE Cat. No.04CH37576)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124983635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"In-flight weather trending information: optimal looping characteristics for animated NEXRAD images","authors":"K. Lemos, J. Chamberlain","doi":"10.1109/DASC.2004.1391345","DOIUrl":"https://doi.org/10.1109/DASC.2004.1391345","url":null,"abstract":"In this experiment, we tested the influence of four factors for optimal design of an animated NEXRAD radar mosaic imagery product for the general aviation cockpit: number of frames per loop, total loop time, pilot viewing time (exposure time), and inclusion of animated aircraft track history (aircraft looping). This experiment is the first in a family of experiments being conducted to determine the NEXRAD animation characteristics that optimize pilot weather situation awareness, under differing workloads, and to compare this trending technique with other in-flight trending presentations. Weather situation awareness was measured by the ability of pilots to accurately determine if their aircraft would encounter moderate or severe weather prior to or upon reaching their next waypoint, and in the case of no encounter, to predict the distance between the aircraft and weather at the waypoint. Weather situation awareness was most influenced by the number of frames per loop and loop time. Pilots were able to both predict a future encounter with weather and predict distance more accurately when the animation included at least 5 frames, and with a loop time of at least 1.0 second. Increasing the loop time to 3.0 seconds further increased the accuracy of distance predictions. However, pilots were equally accurate when provided with as few as 4.5 or as many as 13.5 seconds to view the looping presentation. There is some indication that including aircraft looping also enhances weather situation awareness, although further investigation will be required to establish this effect. These results will help in the development of product guidelines for in-flight animated NEXRAD images.","PeriodicalId":422463,"journal":{"name":"The 23rd Digital Avionics Systems Conference (IEEE Cat. No.04CH37576)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123838820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Considerations for upgrading aging military avionics systems with state-of-the-art technology","authors":"T. Redling","doi":"10.1109/DASC.2004.1390748","DOIUrl":"https://doi.org/10.1109/DASC.2004.1390748","url":null,"abstract":"Due to ever tightening budgets in the defense arena, the armed services are making conscious efforts to extend the service life of existing aircraft beyond what was intended at the time of their original design. These aircraft types include extremely old airframes such as B-52H and variants of the C-130, which continues to play a part in 21st century military actions. Relatively new weapons systems are also included, such as the F-117A and B-2A, which are already beginning to experience component obsolescence problems. A major aspect of these upgrade programs involves replacing existing aging avionics with modern digital systems that are more reliable and more capable. In many cases, however, these retrofits are not simply \"plug-and-play\". Careful analysis is required to ensure that no existing capabilities are lost and that the new system can function properly in the legacy aircraft. These considerations can vary depending upon aircraft type and mission. Factors are to consider include interoperability with legacy systems, aircraft mass properties, A-kit wiring, human factors, training, and growth capability for future upgrades. The paper provides guidance on the evaluation of a potential retrofit, thus assisting the readers in developing their own decision support system.","PeriodicalId":422463,"journal":{"name":"The 23rd Digital Avionics Systems Conference (IEEE Cat. No.04CH37576)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116479349","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Avionics fiber-optic and photonics network preliminary technology readiness assessment","authors":"M. Beranek, T. Curran, A. Glista, M. Hackert","doi":"10.1109/DASC.2004.1390787","DOIUrl":"https://doi.org/10.1109/DASC.2004.1390787","url":null,"abstract":"Fiber-optic technology deployment on military platforms is driving the need to re-assess fiber optics and photonics technology readiness for next generation avionics systems. The AEROLAN initiative unveiled at the 22nd DASC and subsequently kicked off at the IEEE LEOS avionics fiber-optics and Photonics Workshop (AVFOP 2004), provides the impetus for a technology readiness assessment (TRA) of the Naval aviation fiber-optics and photonics technology infrastructure. TRA is a valuable methodology for defining technology maturity and making technology investment decisions. Technology readiness levels (TRLs) combined with product assessment scales (PAs) are useful elements for assessing readiness prior to formulating research, development, and test and evaluation (RDT&E) objectives, and subsequent technology transition planning. This paper provides the reader insight into NAVAIR's preliminary readiness assessment of avionics fiber optics and photonics technology for the next generation.","PeriodicalId":422463,"journal":{"name":"The 23rd Digital Avionics Systems Conference (IEEE Cat. No.04CH37576)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129712864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An open software architecture for high-integrity and high-availability avionics","authors":"M. Agrawal, S. Cooper, L. Graba, V. Thomas","doi":"10.1109/DASC.2004.1390766","DOIUrl":"https://doi.org/10.1109/DASC.2004.1390766","url":null,"abstract":"We describe a software architecture that can greatly reduce re-certification costs associated with the re-hosting of avionics applications from one platform to another. This is achieved by (1) enabling the development of core application components independent of platform specific concerns related to I/O and fault-tolerance, (2) defining abstractions of platform I/O and fault-tolerance strategies for use by application components, and (3) providing transforms that enable system integrators to build a system with its specific I/O and fault-tolerance requirements using platform-independent application components. Application component and transform source code (and in many cases, binaries) can be moved from one platform to another without the need for modification. The system configuration and any new transforms developed still need to be recertified. The I/O abstractions defined by the architecture are key to enable the development of platform independent application components. Inputs to components are simple values (signals) with attributes such as refresh rate and units. On different platforms, these values may be generated at different rates, in different units, and in different ways (by combining values from multiple sources, produced by a fail-stop source, etc.). Transforms mask these platform differences from application components. Similarly, differences in component output attributes and those required by the platform are handled by transforms. The architecture makes provision for application specific built-in-tests, fault-detectors, and reconfiguration strategies. Again, these are specified and implemented independent of core application functionality, allowing application components to be moved across platforms with different fault-tolerance strategies. A software framework based on this architecture has been implemented and demonstrated using an FMS-like application. Core application functionality was implemented as components and packaged as shared libraries. Multiple I/O and redundancy schemes were then constructed using these application modules by changing only the configuration. This demonstrated the feasibility of developing application components in a platform independent manner and configuring them for different platforms.","PeriodicalId":422463,"journal":{"name":"The 23rd Digital Avionics Systems Conference (IEEE Cat. No.04CH37576)","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134193613","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The en route research management plan: a new approach to managing research","authors":"J. Rehmann, K. Buondonno, W. Humbertson","doi":"10.1109/DASC.2004.1391273","DOIUrl":"https://doi.org/10.1109/DASC.2004.1391273","url":null,"abstract":"This paper describes a novel approach for using Web-based technology to manage en route research for the Federal Aviation Administration. Using the validation data repository (VDR) FAA will manage planned and ongoing en route research to support National Airspace System (NAS) modernization. Information about the approach, the VDR, its history, development, and use, planned activities, and future improvements is described.","PeriodicalId":422463,"journal":{"name":"The 23rd Digital Avionics Systems Conference (IEEE Cat. No.04CH37576)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134235629","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation of VDL modes in the en-route domain","authors":"R.W. Murawski, S. Bretmersky, V. Konangi","doi":"10.1109/DASC.2004.1391232","DOIUrl":"https://doi.org/10.1109/DASC.2004.1391232","url":null,"abstract":"In this paper we investigate the performance of VDL modes 2,3, and 4 in the en-route domain by simulating mobile aircraft that dynamically establish and disconnect links to the ground station. In simulation one, the aircraft modeled are within a single sector of airspace which is the current boundary for en-route aircraft communication. The second simulation models all aircraft within range of the VDL network, a 200 nautical miles radius. In both simulations, the aircraft trajectories simulate real traffic patterns of aircraft controlled by the Cleveland Air Route Traffic Control Center (ARTCC). The primary statistic used to evaluate the performance of the VDL modes is the subnetwork delay. Based on the simulation scenarios investigated in this research, the subnetwork delays for all three modes are substantially less than the corresponding maximums specified in the standards.","PeriodicalId":422463,"journal":{"name":"The 23rd Digital Avionics Systems Conference (IEEE Cat. No.04CH37576)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133641671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}